64 + 34 : (x * 3 - 15) = 70

Question

64 + 34 : (x * 3 - 15) = 70

Answer 1

64+36:(x*3-15)=70

36:(x*3-15)=70-64

36:(x*3-15)=6

(x*3-15)=36:6

(x*3-15)=6

х*3=6+15

х*3=21

х=21:3

х=7